Cellular phone and cellular phone control method

Abstract

The present invention provides cellular phone in which a plurality of mounting parts for IC cards in which the country number of the contracting country and the own-station telephone number are stored are disposed, the cellular phone comprising position information storage means that store position of the cellular phone, selection means which make it possible to select the IC card in which the own-station telephone number that is used for calling is stored, first determination means which determine, on the basis of the country number stored in the selected IC card and the stored position information, whether or not calling is to be performed by adding header information for accessing the exchange of the contracting country of the IC card, and calling means which perform calling by adding the header information in cases where the first determination means determine that calling is to be performed by adding the header information.

Description

RELATED APPLICATIONS [0001] This application claims the priority of Japanese Patent Application No. 2004-001944 filed on Jan. 7, 2004, which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a cellular phone which can mount an IC card such as (for example) an SIM (subscriber identity module) card or the like, and a control method for this cellular phone. [0004] 2. Description of the Prior Art [0005] In the GSM (global system for mobile communication) that has been standardized in Europe, an IC card called an SIM card (hereafter referred to simply as an “SIM card”) is essential. Information such as authentication algorithms, telephone numbers and the like required for calling and receiving calls is contained in this SIM card, and calling and the receiving of calls that are the intrinsic functions of a telephone can be performed by a GSM standard cellular phone by inserting this card into such a ce...

AI Technical Summary

Benefits of technology

[0015] The present invention is devised in light of the above-mentioned problems. It is an object of the present invention to provide a cellular phone which makes it possible to prevent the fact that a plurality of IC cards are being used from becoming known to correspondents, and which also makes it possible to achieve a secure separation of use according to telephone numbers, and to prevent mixing of communications charges and a deterioration in personal relationships.

[0020] selection means for making it possible to select the IC card in which the own-station telephone number that is used for calling is stored from the IC cards mounted in each of the abovementioned plurality of mounting parts;

[0039] (5) A cellular phone control method, in which the cellular phone is provided with a plurality of mounting parts that allow the mounting of IC cards in which at least the country number of the contracting country and the own-station telephone number are stored, this cellular phone comprising position information storage means for storing position information indicating the position where the abovementioned cellular phone is located, and selection means for making it possible to select the IC card in which the own-station telephone number that is used for calling is stored from the IC cards mounted in each of the above-mentioned plurality of mounting parts, wherein the method comprises:

Problems solved by technology

Specifically, in a state in which this card is not inserted, the standard is a standard that does not allow calling or the receiving of calls by the cellular phone.

Furthermore, other causes of an increase in the number of cellular phones owned by a single individual include the possession of cellular phones contracted overseas in addition to cellular phones contracted in Japan by persons who work as directors in more than one country, persons who frequently make overseas business trips and the like.

However, depending on the situation of the user or the like, there may be cases in which the user does not wish the correspondent to know that a plurality of SIM cards are being used.

As a result, there is some concern that it may be difficult to ensure a reliable division of use according to telephone numbers.

Furthermore, there is also a danger that this will lead to a deterioration in personal relationships.

If telephone calls are made using a certain SIM card for the reason that charges are reduced due to the fact that the contracting country of this SIM card coincides with the country in which the cellular phone is used, the following problem in terms of cellular phone charges arises: namely, communications charges for private use and public use may become mixed together.

Furthermore, the following problem may also be encountered: namely, even in cases where a certain cellular phone is a cellular phone used for private purposes, there may be users who wish to separate the use of an own-station telephone number used for recreational purposes and an own-station telephone number used for family purposes.

As a result of such problems, users who wish to separate the use of a plurality of own-station telephone numbers encounter the following problem: namely, it is not sufficient that the communications charges be inexpensive; it is also necessary to take into account the abovementioned problems encountered in communications expenses, and the problem of the own-station telephone number becoming known to the correspondent.

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